Endress+Hauser OxyMax W COS 41 User manual

Quality made by
Endress+Hauser
ISO 9001
BA 284C/07/en/05.01
No. 51506691 OxyMax W COS 41
Sensor for Measuring
Dissolved Oxygen
Operating Instructions

OxyMax W COS 41
Endress+Hauser
Contents
1 Safety instructions . . . . . . . . . . . . . . . . . 2
1.1 Notes on safety conventions and icons . . . . . . 2
1.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Installation, comissioning and operation . . . . . 2
1.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Identification . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Product structure . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . 4
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Measuring device . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . 6
3.3 Installation location and position . . . . . . . . . . . 7
3.4 Sensor design and functional description . . . 11
3.5 Post-installation check . . . . . . . . . . . . . . . . . . 12
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Direct connection to the transmitter . . . . . . . . 13
4.2 Connection via the junction box VBM . . . . . . 13
4.3 Post-connection check . . . . . . . . . . . . . . . . . 14
5 Commissioning . . . . . . . . . . . . . . . . . . 15
5.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Polarisation . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Maintenance . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Cleaning the outside of the sensor . . . . . . . . . 18
6.2 Regeneration . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Accessories . . . . . . . . . . . . . . . . . . . . . . . 22
7.1 Connection accessories . . . . . . . . . . . . . . . . . 22
7.2 Installation accessories . . . . . . . . . . . . . . . . . 22
7.3 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.4 Measurement, controlling and cleaning
the sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Trouble-shooting . . . . . . . . . . . . . . . . . 23
8.1 Trouble-shooting instructions . . . . . . . . . . . . . 23
8.2 Sensor test . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9 Technical data . . . . . . . . . . . . . . . . . . . . 25
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

1 Safety instructions OxyMax W COS 41
2Endress+Hauser
1 Safety instructions
1.1 Notes on safety conventions and icons
#Warning!
This symbol alerts you to hazards which could cause serious injuries as well as
damage to the instrument if ignored.
"Caution!
This symbol alerts you to possible faults which could arise from incorrect operation.
They could cause damage to the instrument if ignored.
!Note!
This symbol indicates important items of information.
1.2 Designated use
The oxygen sensor COS 41 is suitable for continuous measurement of dissolved oxygen
in water.
Typical applications are:
•Measuring oxygen content in activated sludge basins.
The measuring signal is used for monitoring and as a control parameter.
•Checking oxygen content in the discharge of a sewage treatment plant.
•Monitoring public waters.
Measuring and controlling the oxygen content in fish farming water.
•Oxygen enrichment in drinking water.
#Warning!
•If the device is used for any application other than those described in this manual, it
may lead to unsafe and improper functioning of the measuring system and is therefore
not permitted.
•Make sure you strictly adhere to the warnings and notes in these Operating Instruc-
tions.
1.3 Installation, comissioning and operation
#Warning!
•Only trained technical personnel may carry out installation, electrical connection,
commissioning, operation and maintenance of the measuring system. The technical
personnel must be authorised to do this by the system operator.
•Technical personnel must be familiar with the instructions in this manual and must ad-
here to them.
•Before switching on the system, check all the connections again for correctness.
•Do not operate damaged sensors. Indicate them as being defective.
•Measuring point faults may only be remedied by authorised and trained personnel.
•If faults cannot be repaired, the sensor must be taken out of service and secured
against unintentional commissioning.
•Repairs may only be carried out by the manufacturer or by the Endress+Hauser serv-
ice organisation.

OxyMax W COS 41 1 Safety instructions
Endress+Hauser 3
1.4 Operational safety
The COS 41 sensor is operationally reliable and is made to the state of the art. The ap-
propriate regulations and EC directives (see "Technical data") have been met.
As the user, you are responsible for complying with the following safety conditions:
•Explosion protection regulations
•Installation instructions
•Operating instructions for the assembly and its materials
•Local prevailing standards and regulations
1.5 Return
If the device requires repair, please send the sensor clean (see page 18) to the appro-
priate Endress+Hauser sales offices. Please use the original packaging where possible.
Please add the filled in »Declaration of contamination« (copy the last but one page of
this manual) to the packing of the sensor and add it also to the shipping documents.
1.6 Disposal
Defective, non-repairable sensors must be disposed of.
Please keep to the local disposal regulations!

2 Identification OxyMax W COS 41
4Endress+Hauser
2 Identification
2.1 Product structure
COS 41
2.2 Scope of delivery
!Note!
•Make sure the packaging is undamaged!
Inform the post office or the courier of any damage to the packing.
Keep the damaged packaging until the matter has been clarified.
•Make sure the contents are undamaged!
Inform the post office or the courier of any damage to the delivered contents.
Keep the damaged products until the matter has been clarified.
•Use the delivery papers to check that the scope of delivery is complete.
The following items are included in the delivery:
•1 oxygen sensor COS 41 with transport protection cap for membrane protection
•1 Accessories Set COY 31-Z with the following contents:
–1 spare replacement cartridge COY 31-WP
–10 plastic ampoules containing electrolyte filling COY 3-F
–1 sealing kit COY 31-OR with 3 O-rings
–6 abrasive sheets
•Operating Instructions BA 284C/07/en
If you have questions, please contact your supplier or your nearest
Endress+Hauser sales office (see the back page of this Operating Instructions).
Cable length
2 Cable length 7 m
4 Cable length 15 m
8 without cable (only for TOP 68 version)
9 Special design to customer specifications
Cable connection
F Fixed cable connection
S Cable connection using TOP 68 plug
COS 41- Complete order code

OxyMax W COS 41 3 Installation
Endress+Hauser 5
3Installation
3.1 Measuring device
A complete measuring system comprises:
•Oxygen sensor COS 41
•Oxygen transmitter Liquisys M COM 223/253-DX/DS
Optional:
•Universal suspension assembly support CYH 101 for immersed operation
•Immersion assembly COA 110 or DipFit W CYA 611 or flow assembly FlowFit W COA
250 or retractable assembly Probfit W COA 461
•Junction box VBM
•Automatic spray cleaning system Chemoclean
Fig. 3.1: Complete measuring device for COS 41 with Liquisys M COM 223/253-DX/DS
1 VBM junction box (only if cable extension required)
2 Transmitter Liquisys M COM 223/253-DX/DS
3 Immersion assembly CYA 611
4 Oxygen sensor COS 41
C07-COS4xxxx-14-05-00-xx-001.EPS
12
3
4

3 Installation OxyMax W COS 41
6Endress+Hauser
3.2 Installation conditions
3.2.1 Installation dimensions
Fig. 3.2: Dimensions COS 41
fixed cable version Fig. 3.3: COS 41 with TOP 68 plug-in head and TOP 68 plug-in cable
171
Ø40
144
190
C07-COS41xxx-06-05-00-xx-001.EPS
C07-COS41xxx-06-05-00-xx-002.EPS

OxyMax W COS 41 3 Installation
Endress+Hauser 7
3.3 Installation location and position
The sensor can be installed up to the horizontal in an assembly, support or a suitable
process connection (Fig. 3.4). Other angles are not permissible. Do not install the sen-
sor overhead.
Permissible installation .
Fig. 3.4: Permissible installation positions for the COS 41 oxygen sensor
!Note!
Make sure you comply with the instructions for installing sensors. You will find them in
the Operating Instructions for the assembly used.
Installing a
measuring point
For a complete installation of a measuring point, proceed as follows:
1. Installing an retractable or an flow assembly (if used) into the process.
2. Water connection to the rinse connections (if you use an assembly with cleaning
function).
3. Installing and connecting the oxygen sensor.
4. Installing an immersion or an suspension assembly (if used) into the process.
"Caution!
•For immersed operation, the sensor must be installed in an immersion assembly (e.g.
CYA 611). Do not install the sensor suspended from the cable.
•Screw the sensor into the assembly so that the cable is not twisted.
•Avoid exerting excessive tensile force on the cable (e.g. from jerky pulling).
•Select the installation location so that there is easy access for later calibration.
#Warning!
When using metallic assemblies and installation equipment, comply with national
grounding regulations.
Pre-installation
For immersed operation, install the individual modules away from the basin on a solid
base. Only carry out the final installation at the intended installation location.
Placing
Select the installation location so that there is easy access for later calibration. Make
sure that upright posts and assemblies are secured safely and vibration-free. For
immersed operation in an activated sludge basin, select an installation location which
produces a typical oxygen concentration.
C07-COS41xxx-11-05-00-en-001.EPS
Permissible angle of installation

3 Installation OxyMax W COS 41
8Endress+Hauser
3.3.1 Installation examples
Immersed operation
For large basins, where sufficient installation distance is required from the basin edge,
it is advisable to use the upright post and chain assembly (Figs. 3.5 and 3.6). The
free swinging of the immersed assembly practically rules out vibrations from the upright
post.
Fig. 3.5: Universal assembly support CYH 101-A with immersible
pendulum assembly CYA 611 Fig. 3.6: CYA 611: Components and dimensions
1
2
3
4
5
6
7
8
9
10
Weather protection cover
Dummy plug
Upright post square pipe stainless steel AISI 304
Transverse pipe stainless steel AISI 304
Velco fastener
Plastic chain, length 5 m
Immersion assembly CYA 611
Second fixing possibility for transverse pipe
Plastic shackle
Star handle
1
2
3
4
5
Protective cap
Worm drive hose clip
Pipe clips (detailed drawing in right half of figure)
PVC pipe
Threaded coupling
C07-COS41xxx-11-05-00-xx-002.EPS
60 x 60 x 2
max. 1400
1480 Ø36 x 1,6
1500
950
450
4 x Ø12 60 x 60 x 2
120
1
2
3
45
6
7
10
9
8
C07-COS41xxx-11-05-00-004.EPS
1
2
3
4
5
625
58
Ø6,5
Ø14
Ø40
22
60
1580
1630
Ø48
Ø40